Stages of mitosis Cell Cycle 2 phases Interphase

Stages of mitosis

Cell Cycle 2 phases: Interphase & mitotic phase all subphases cell grows Produces proteins and all organelles BOTH mitosis and cytokinesis 24 hrs 10 - 12 hours 5 -6 hours 4 - 6 hours 1 hour

Stages of Mitotic Phase MITOSIS • Prophase • Metaphase • Anaphase • Telophase & Cytokinesis • (I Probably Mixed All This up)

How to remember the name of the phases • (Interphase) Not part of mitosis MITOSIS • Prophase • Metaphase • Anaphase • Telophase & Cytokinesis Use the Pneumonic: (I Probably Mixed All This up)

Interphase • • • 90% of Cell Cycle G 1, S, & G 2 Nucleolus visible Chromosomes replicating Nuclear membrane intact Single Centrosome replicates in animal cells

Prophase Chromatin shortens and condenses Chromosomes appear as sister chromatids (X) Nucleolus disappears Nuclear membrane disappears Centrosomes (Centrioles) move to the poles Spindle fibers form

When chromosomes replicate they look like X’s

Metaphase • • Chromosomes meet @ equator/middle Centrioles are @ poles Spindle fibers attach to Kinetochores Longest phase

Anaphase • Spindle fibers shorten and pull chromosome by centromere • Chromosomes move apart/away • Sister chromatids separate • Shortest phase 2 sets of chromosomes!!

Telophase & Cytokinesis • Chromosomes are @ poles • Chromosomes lengthen & Nuclear envelope reforms • Nucleoli reappear • Cleavage furrow / Cell plate forms

Summary of phases:

G 2 -> prometaphase

Metaphase -> cytokinesis

Animal Cell Division more images

What Phase is This? prometaphase prophase Late telophase, early interphase

metaphase anaphase

Phases as they progress

Cytokinesis: division of the cytoplasm • Animal Cell Cleavage Furrow • Plant Cell Plate (Deposited by the golgi)

Mitosis movies. View them! 3 D tutorial cells alive mcgraw-hill. com